Schill + Seilacher “struktol” Aktiengesellschaft

Schill + Seilacher Aktiengesellschaft

Schill + Seilacher Gmbh

Schill + Seilacher “struktol” Gmbh

Holger Keller

Uwe Storzer

Manfred Doering

Berthold Just

Uwe Dittrich

Michael Ciesielski

Horst Rieckert

Udo Glauner

Sebastian Seibold

Seljam Imeri

Just Berthold

Manfred Döring

A halogen-free flame retardant obtainable by polycondensation of phosphoric monomers with esterifying monomers is provided. The phosphoric monomer is an adduct of 9,10-dihydro-9-oxa-10-phospha-phenanthrene-10-oxide (DOPO) and ring substituted DOPO derivatives to unsaturated carboxylic acids. Monovalent and polyvalent alcohols are used as esterifying monomers. The flame retardant has an average molecular weight of more than 20,000 and an average degree of polymerization Pof at least 55, and is preferably used for the production of polyamide fibers and polyester fibers by melt spinning.

Halogen-free flame retardants

Nitrous bridged derivatives of 6H-dibenz[c,e][1,2]-oxaphosphorine-6-oxides, process for the preparation and use thereof. The invention refers to nitrous bridged derivatives of 6H-dibenz[c,e][1,2]-oxaphosphorine-6-oxides, a process for the preparation thereof and their use as flameproofing agents for polymers such as polyesters, polyamides, polycarbonates, polystyrenes, polyethylene, polypropylene, phenolic and epoxy resins. The derivatives have the Formulae I or II: 

Nitrous bridged derivatives of 6H-dibenz[c,e][1,2]-oxaphosphorine-6-oxides, process for the preparation and use thereof

The invention relates to a method for preparing halogen-free flameproof epoxy resins, in which a halogen-free epoxy resin is reacted with a polyfunctional aldehyde or ketone and a phosphinic acid derivative, wherein the phosphinic acid derivative contains at least one P&#x2014;H-active structural unit of the formula &#x2550;PH(O) and is used in an amount equivalent to the polyfunctionality of the aldehyde or ketone, to a halogen-free flameproof epoxy resin obtainable by this method, to the use of the epoxy resin as a base material for the manufacture of printed circuit boards and printed circuits and to intermediates used to prepare the epoxy resins.

Halogen-free flameproof epoxy resin formulations

Growing community of inventors

Reppenstedt, Germany

Holger Keller